Service processing method, information transmission method, and relevant devices

A terminal, comprising a processor, a memory, and a computer program stored in the memory and executed by the processor, wherein the processor is configured to execute the computer program to perform operations comprising:

• transmitting related information about service processing to a first network unit in a first network, wherein the first network unit in the first network is an Access Management Function (AMF) or Mobility Management Entity (MME), so as to perform relevant processing on a target service, wherein the related information about the service processing comprises at least one of:
• related information indicating whether the terminal supports handover attach, or related information indicating whether the first network and/or the second network supports preservation of an IP address of the terminal in accordance with the terminal indicating handover, wherein the related information indicating whether the terminal supports handover attach refers to information indicating that the terminal supports to indicate the request type in a Protocol Data Unit (PDU) connection request as handover;
• and
• receiving service support indication information from the first network unit in the first network, wherein the service support indication information is determined in accordance with the related information about service processing, wherein the service support indication information is used to indicate whether the target service is to be supported or the target service is not to be supported;
• or
• receiving or not receiving a service support indicator for a target service from the first network unit in the first network, wherein whether the service support indicator is transmitted or not is determined in accordance with the related information about service processing,
• wherein the target service comprises voice service or emergency service.

A non-transitory computer-readable storage medium, storing a computer program, when the computer program is executed by a processor of a terminal, the terminal is enabled to perform the following operations:

• transmitting related information about service processing to a first network unit in a first network, wherein the first network unit in the first network is an Access Management Function (AMF) or Mobility Management Entity (MME), so as to perform relevant processing on a target service, wherein the related information about the service processing comprises at least one of:
• related information indicating whether the terminal supports handover attach, or related information indicating whether the first network and/or the second network supports preservation of an IP address of the terminal in accordance with the terminal indicating handover, wherein the related information indicating whether the terminal supports handover attach refers to information indicating that the terminal supports to indicate the request type in a Protocol Data Unit (PDU) connection request as handover;
• and
• receiving service support indication information from the first network unit in the first network, wherein the service support indication information is determined in accordance with the related information about service processing, wherein the service support indication information is used to indicate whether the target service is to be supported or the target service is not to be supported;
• or
• receiving or not receiving a service support indicator for a target service from the first network unit in the first network, wherein whether the service support indicator is transmitted or not is determined in accordance with the related information about service processing,
• wherein the target service comprises voice service or emergency service.